Good stuff to know/look for, Doubeleive. After installing them, I did give em a squeeze test and found them to be firm with a little/slight give. I do occasionally hear the pump on some starts- figured it to be normal. Again, good stuff to know & look for. Thanks!firm is good, you should also hear the pump run on a key cycle "most of the time" according to GM, there may be instances where it does not activate each key cycle.
if you listen closely to the pump by the drivers rear wheel and do a auto-start you should hear a brief exhale by the pump just before it runs, then after the vehicle is parked, shut off and it has sat for a minute or so you may hear another brief exhale.
if the shocks feel really hard that could be a sign of the relief valve on the pump not working then it just inflates them to crazy psi and the result is a rough bumpy ride.
you could also take it a for a 5-10 minute drive, park on a level surface, leave it running and reach under there and feel the rear shocks they should still be "firm" if they are very squishy that could indicate a leak somewhere. low psi on the rear shocks though would make the rear left/right sway worse rather than create a bumpy ride, unless they were completely deflated perhaps.
This forum is great!!